package cc.eddic.practice.spring.webapi;

import cc.eddic.practice.spring.dto.*;
import cc.eddic.practice.spring.repository.CategoryRepository;
import cc.eddic.practice.spring.repository.QuestionRepository;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.springframework.http.HttpEntity;
import org.springframework.http.RequestEntity;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.support.ServletUriComponentsBuilder;

import javax.transaction.Transactional;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/api/questions")
public class QuestionRestController {
    private final QuestionRepository repository;

    public QuestionRestController(QuestionRepository repository) {
        this.repository = repository;
    }
    @PostMapping
    public HttpEntity<?> add(@RequestBody final QuestionAddRequest model){
        val question=repository.save(model.as());
        return ResponseEntity.created(ServletUriComponentsBuilder.fromCurrentRequest().path("/{id}").buildAndExpand(question.getId()).toUri()).build();
    }
    @DeleteMapping("/{id}")
    public HttpEntity<?> del(@PathVariable("id") final long id){
        repository.deleteById(id);
        return ResponseEntity.noContent().build();
    }
    @GetMapping("/{id}")
    public HttpEntity<QuestionResponse> get(@PathVariable("id") final long id){
        if (log.isDebugEnabled()) log.debug("id={}",id);
        val question=repository.findById(id).orElseThrow(NoSuchElementException::new);
        return ResponseEntity.ok(QuestionResponse.from(question));
    }
    @Transactional
    @PostMapping("/{questionId}/options")
    public HttpEntity<?> add(@PathVariable("questionId") Long questionId, @RequestBody final OptionAddRequest model){
        val question=repository.findById(questionId).orElseThrow(NoSuchElementException::new);
        val option=model.as();
        question.add(option);
        repository.save(question);
        return ResponseEntity.ok().build();
    }

    @GetMapping("/{questionId}/options")
    public HttpEntity<?> get(@PathVariable ("questionId") Long questionId){
        if (log.isDebugEnabled()) log.debug("questionId = {}",questionId);
        val question = repository.findById(questionId).orElseThrow(NoSuchElementException::new);
        if (log.isDebugEnabled()) log.debug("run lazy load");
        return ResponseEntity.ok(question.getOptions().stream().map(OptionResponse::from).collect(Collectors.toList()));
    }
    @GetMapping("/{questionId}/options/{optionId}")
    public HttpEntity<?> get(@PathVariable ("questionId") Long categoryId,@PathVariable("optionId") Long optionId){
        val question = repository.findById(categoryId).orElseThrow(NoSuchElementException::new);
        val option = question.getOptions().stream().filter(option1 -> option1.getId().equals (optionId))
                .findFirst().orElseThrow(NoSuchElementException::new);
        return ResponseEntity.ok(OptionResponse.from(option));
    }
    @GetMapping
    public HttpEntity<List<QuestionResponse>> getAll(){
        val quetions=repository.findAll().stream().map(QuestionResponse::from).collect(Collectors.toList());
        return  ResponseEntity.ok(quetions);
    }
}
